It looks like the iPhone speculation train is gaining steam on the way to its final destination, and this time it's flying by Cincinnati Bell's pre-paid service, i-Wireless. A helpful tipster sent in the above screenshot of an iPhone 5 placeholder, accompanied by a $639.99 price tag and a handful of specs: 32GB, 4-inch screen and 4G data speeds. Our friends over at TUAW have also procured a screenshot (after the break) from the same site, displaying a $99.99 16GB iPhone 4S, sporting a 5MP camera, 3.5-inch screen and an A5 processor. Of course, there's also a chance these are just placeholders, but we're hoping Tuesday's announcement will bear dual fruits, nonetheless.